In my games the goddess of death is always very jealous of other people using resurrection. To the extent that most other churches will make you get the Raven Queens blessing before any resurrection. She is neither good nor bad, but demands to be respected.
One little quest I use is that the PCs will be required to kill somebody at the Raven Queen's churches say so. The person might not be good, or bad, or innocent or guilty. They will just be some person that should be dead and yet are alive still. A farmer that survived a freak accident that should have killed them, a child that should not have lived through a fever, a criminal that should have been hung that escaped.
Taking on such an agreement shows that the PC values the "weave of fates" and the job that the goddess of death does over their own petty feelings of morality. If they are unwilling to do this, then they do not understand her great work and are unworthy. If they try and negotiate to only execute her will against 'bad guys', then they do not understand her ways at all. She does not judge good or bad, just those that should and should not be, at this fleeting moment in time.